Improvement in sifters



. box, which is objectionable.

OFFIoE.

THOMAS J. MOZART, or sranveri Ln, MASSACHUSETTS, nssrenon or ONE-HALF onH s RIGHT TO r. TUCKER, OF SAME PLACE.

lM RQVEiMEN -N 3 E Specification forming part of Letters Patent No. 220,64Q, dated October 14, 1879 application filed April 24, 1879.

To all whom; it may concern:

Be it known that I, THOMAS J. MOZART, of Springfield, county of Hampden,and Commonwealth of Massachusetts, have invented certain new and usefulimprovements in devices for converting rotary into reciprocating motion,and in combining the same'with other devices in the construction ofsieves for sifting ashes, of which the following is a specification. V y

Prior to my invention the sieve of an ashsifter had been hung by a linkpassing up, next to the gearing, through the casing in which the sieveis inclosed, and attaching its upper end to the interior of an invertedcap, to obtain a longer length of link without an enlargement of thesieve-casing, and the lower end of the sieve arrangedon an incline planesuspended to thesieve-casing by means of screw-bolts or theirequivalents, thereby making thesieve a fixture of the sieve casing orAgain, a com mon round sieve has been placed upon a triangular framearranged in a barrel, and motion imparted to the frame by means of ahandle passing through the barrel, whereby a perfect freedom in alldirections is allowed the sieve. Also, the rotary motion has beenconverted into reciprocating motion by the use of a cam-wheel; but ithas been done by causing a pin in the sliding bar or equivalent deviceto traverse a groove in the cam-wheel. This is objectionable on accountof the friction.

I am well aware, also, that sieves have .been shaken by cam-Wheels andother devices, the sieve usually sliding on ways. This is objectionablefor the same reason, the power required to overcome the friction beingso great that many of the sieves cannot be used as a household utensil.

The object of my invention is to make a mechanical device to convertrotary into reciprocating motion without the loss of any appreciableamount of power by reason of the friction, and to construct a sievewhich shall be of easy construction and convenient, and with which arapid shaking motion may be had while the sieve is heavily loaded, the

"at the outlet end of the sieve.

wheel being turned slowly, and requiring the outlay of but a smallamount of power.

My inventi0n,therefore, consists in the combination of a cam-wheel of apeculiar construction, a sliding bar with friction-pulleys engaging withthe said cam-Wheel, and an ash-sifter resting loosely upon a wire frame,as will be hereinafter more fully set forth, and pointed out in theclaims.

In the drawings, in which similar letters of reference indicate likeparts, Figure l is a top vieti of my device. Fig. 2 is a side view ofthe same, with the balance and cam wheels removed, showing the partswithin the box in dotted lines. Fig. 3 is a top view of the slide Fig. 4is a view of the wires on which the sieve rests, as seen i from thedirection of the end of the box and Fig. 5 is a side view of thecam-wheel. Fig. 6 is a vertical sectional view taken through the line 00m of Fig. 1.

In the annexed drawings, forming a part of this specification, theletter J represents the cam, made of any size desired.

I find a diameter of from three to five inches sufficient for allordinary uses in sieves for sifting ashes.

In the construction of the cam-wheel, care should be taken that theouter edge of the flange or worm does not make such sharp turns as toproduce a jarring motion, this being found in most cams of similarconstruction now in use, the difficulty being found at the point wherethe direction of the motion is changed. Iovercome this by filling theinner side, so that the friction-pulley will traverse the arc of acircle, or nearly so. This, while quickly changing the direction of themotion, prevents the jar and backlash, which would result were thecam-wheel not so constructed.

The bar 0 slides in the support a, and, passing through the plate .9 andbox, is connected with the sieve by the hook 012.

The cam-wheel J is secured to the shaft F, one end of which rests in theplate 8, and the other end rests in the frame 0. On the end of thisshaft is the crank and balance wheel h, as shown.

The sieve is suspended in or rests upon the rods j, which pass up ateach side, and are held in place by screws or other convenient device,which allows them to swing in either direction. The rods f are connectedby the rod '5, as shown, thus preventing their swinging out of place.

My sieve D, with its surrounding walls, is placed loosely upon the framecomposed of the wire rods f f and i, but, connected to the reciprocatingbar 0 of the mechanism by means of the hook m, is substantially devoidof friction, as the labor of sifting is almost expended in the work, andthe suspended wire frame has a tendency to increase the speed of thesieve, so desirable in clearing the coal of the ashes. This sieve is notencumbered with a locking device, but is easily removed from itsresting-place for the obvious advantage of picking out the clinkers andfinal emptying to the saving box or receptacle for such sifted coals.

The friction-pulleys n n are made tapering, to overcome the tendency torise. These pulleys should not bear against the cam for more than aneighth of an inch.

The book m is secured to the sieve, and hooks through the end of bar 0,as shown.

As a square sieve is not convenient to empty, I make the opening at theend, as shown, and make the slide 1, with the V-grooves l l and handleorprojection 1-. Although Ideem these grooves the cheapest and best way tofasten the slide in place, I do not confine myself to them, as manyother devices may be substituted to hold the slide in place. Theprojection r is designed as a handle.

Across the corners, at the outlet end, I place the pieces t t, forguides, and they also serve as braces, and thus strengthen the sieve.

The frame 0 is made as shown in the drawings, and secured to the box byscrews. It will be seen that this arrangement may be easily attached toa box of any shape by simply bending the supporting-wires to the lengthrequired, cutting a hole for the sliding bar, and screwing the frame,plate, and support in place. It will be seen that with thesefriction-pulleys n n and cam-wheel J, and the sieve resting on theseswinging wires f t, a sieve is constructed in which the friction isreduced to a minimum. Any convenient form of door or corner may beattached to the box.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is--- 1. The combination, substantially ashereinbefore described, of the cam-wheel J, of the construction setforth, the sliding bar 0, having at its outer end friction-rollers n nand at its inner end a perforation, and the removable horizontal sifterD, loosely connected to the sliding bar, whereby the friction-rollerstraverse the arc of a circle and jarring is avoided.

2. The combination, in an ash-sitter, of the cam-wheel, suitablysupported, a sliding bar with friction-pulleys engaging with the saidcam-wheel, and the other end attached to a sieve for holding ashes, anda swinging frame passing around and under the sieve, substantially asdescribed, and for the purpose set forth.

In testimony whereof I have hereunto set my hand, in the presence of twowitnesses, this 11th day of April, A. D. 1879.

THOMAS J. MOZART.

Witnesses:

L. H. BINGHAM, ALLEN WEBSTER.

